Improvement in machines for rolling nut-blank bars



H. JOHNSON,

MACHINES FOR ROLLING NUTBLANK BARS,

No.18Z 831, Patented-0ct.3.18I76 V/ I I y ATTORNEYS.

HENRY JOHNSON, OF HAVERSTRAW, NEW YORK.

IMPROVEMENT IN MACHINES FOR ROLLING NUT-BLANK BARS.

Specification forming part of Letters Patent No. 1 82,831, dated October3, 1876; application filed August 21, 1876.

To all whom it may concern:

Be it known that I, HENRY JoHNsoN, of Haverstraw, in the county ofRockland, and State of New York, have invented a new and ImprovedMachine for Rolling Nut-Blanks and other articles, of which thefollowing is a specification Figure 1 is a side elevation. Fig. 2 is anend elevation on line 00 w in Fig. 1. Fig. 3 is a side elevation of amodified form of rolls. Fig. 4 is a side elevation, with partbrokenaway, representing another form of rolls. Fig. 5 is a detail view,showing the manner of holding the guide.

My invention relates to a pair of rolls, each one of which is made up ofsections that are detachably fixed to the shaft. One section of eachroll is conical, and forms the flat of the bar, and another section ischambered out to receive the smaller end of the conical section, and hasformed on its side the reverse of the form required in the edge of therolled bar. By this arrangement the flat of the bar passes through therolls at an angle withthe axes of the rolls between a line parallel withthe axes and a line running at right angles to the axes of the rolls.

A and B are rolls consisting of the sections a b c detach-ably fixed tothe shafts O O, which are supported in journal-boxes in the frame D, inthe usual manner. The sections a b c are arranged oppositely in theupper and lower rolls, so that the sections b, which are conical,present parallel surfaces. The parts a are chambered out to receive thesmaller end of the conical parts I), and that portion of the part a thatembraces the end of the part bis notched at e. The apex of the angle ofthe notches represent opposite corners of a hexagon nut. The conicalparts 1) form the flat of the nut-bar, and the space between the ends ofthe teeth formed on opposite sections. 60 represents the side of thenut, which is formed by cutting the nut from the bar. The thickness ofthat portion of the part a that surrounds the part 1) determines thethickness of the rolled blank. The part c is fixed on the shaft and thepart b abuts against it. E is a groove of any suitable form cut in thepart c in the lower roll for the purpose of retaining a guide, f. i

It will be seen that iron passing through these rolls will be compressedflatwise more than sidewise, thus filling the notches e, and will bedelivered to the guide f. A bar of iron rolled in this way and cut up atthe narrowest part forms hexagon nut-blanks, having the fibers of theiron arranged in the most advantageous manner, as they are compressedflatwise or in the same direction in which they were formed from thepile. Whereas, if the blanks were formed by pressure at the edges of thebar the laminae formed by reducing the bar from the pile would be moreor less buckled and separated, and the strength of the blanks would beimpaired. In Fig. 3 the rolls are composed of the parts a b c, whichare, in all respects, similar to the ones previously described, exceptthat the sides of the conical part form a less acute angle with the axesof the rolls. This throws the base of the cone out beyond the part a,forming a support for the guide f and dispensing with the groove E. InFig. 4 the parts forming the rolls differ from those of Fig. 1 in havingdepressions in the base of the conical part b, which correspond in formto the part a, but are made deeper than would be required for simplyreceiving the part a for the purpose of making room for cinder andscale. In Fig. 5 the manner of retaining the guidef by means of thegroove E is shown. The guide is provided with a lip that engages withthe groove and prevents it from moving laterally.

I do not confine my invention to the manufacture of nuts alone, as rollsof this description are applicable to the manufacture of bars of ironhavingeither straight or irregularlyformed edges and sides neither do Iconfine myself to the precise arrangement or form of the parts hereindescribed, as they may be varied without departing from my invention.

Having thus described my invention, What I claim as new, and desire tosecure by Letters Patent, is

The combination, in a rolling-mill with one or more rolls or otherdevices, of a roll formed of sections a b c, the first having anirregularly-formed side and the second a conical shape, as and for thepurpose specified.

HENRY JOHNSON.

Witnesses:

G. Snnewrcx, GEo. M. HoPKINs.

